serpent

1 a limbless reptile with a long body an Aztec carving of a feathered serpent representing the god Quetzalcoatl Synonyms snake, viperRelated Words adder, anaconda, asp, black racer, blacksnake, blue racer, boa, bull snake, bushmaster, chicken snake, cobra, constrictor, copperhead, coral snake, cottonmouth moccasin, diamondback rattlesnake, fer-de-lance, garter snake, gopher snake, green snake, hognose snake, horned viper, indigo snake, king cobra, king snake, krait, mamba, milk snake, moccasin, pine snake, pit viper, puff adder, python, racer, rat snake, rattlesnake, sea serpent, sea snake, sidewinder, taipan, water moccasin, water snake, worm snake

2 the supreme personification of evil often represented as the ruler of hell beware the temptations of the serpent Synonyms archfiend, Beelzebub, fiend, Lucifer, Old Nick, Satan, devilRelated Words deuce, dickens; Mephistopheles

3 one who betrays a trust or an allegiance a serpent in their midst had betrayed the revolutionaries to the authorities Synonyms apostate, backstabber, betrayer, double-crosser, double-dealer, Judas, quisling, recreant, traitor, snake, turncoatRelated Words accommodationist, collaborationist, collaborator, sellout, subversive, subverter; coconspirator, conspirator, intriguer, plotter, schemer; defector, deserter, renegade; blabbermouth, gossip, gossiper, gossipmonger, informant, informer, rat, rumormonger, snitch, snitcher, squealer, stool pigeon, talebearer, talker, tattler, tattletale, telltale